Seeing Around the Bus

Understanding the School Bus Danger Zone and Regulatory Variations

Operating a school bus safely begins with understanding that state and local regulations govern school transportation. Because of this regulatory framework, many school bus procedures differ from state to state. As a professional driver, you must be thoroughly familiar with the specific laws and regulations established in your state and your local school district rather than assuming rules are identical everywhere.

The most critical visual concept in school transportation is the danger zone. The danger zone is defined as the area on all sides of the bus where children are in the most danger of being hit by another vehicle or by their own bus. Before moving the bus, check the danger zones and view the crossover, convex, and flat mirrors in a logical sequence to ensure no child or object is in those areas.

The danger zone surrounds the entire vehicle, but its dimensions vary by location. Around the perimeter, the danger zone extends 10 feet from the left side of the school bus, 10 feet from the right side of the school bus, and 10 feet behind the rear bumper of the school bus. Directly ahead of the vehicle, the danger zone can extend as much as 30 feet from the front bumper, with the first 10 feet from the front bumper being the most dangerous part of that front area.

In addition to the physical perimeter measurements, drivers must treat the area to the left of the school bus with heightened caution. The area to the left of the school bus is always considered dangerous because of passing cars. To maintain maximum safety, a driver should check each mirror before operating the school bus to obtain the maximum viewing area, and if necessary, have the mirrors adjusted before driving.

External Mirror Systems: Flat, Convex, and Crossover Mirrors

Outside flat mirrors are mounted at the left and right front corners of the school bus at the side or front of the windshield. Drivers use outside flat mirrors to monitor traffic, check clearances, and see students on the sides and to the rear of the bus. However, flat mirrors do not provide full visibility around the bus. A blind spot exists immediately below and in front of each outside flat mirror, and another blind spot exists directly in back of the rear bumper. The blind spot behind the school bus extends 50 to 150 feet and can extend up to 400 feet depending on the length and width of the bus. To set them properly, outside flat mirrors must be adjusted so the driver can see 200 feet or 4 bus lengths behind the bus, along the sides of the bus, and the rear tires touching the ground.

Outside convex mirrors are located below the outside flat mirrors. These mirrors are used to monitor the left and right sides of the bus at a wide angle, giving the driver a view of traffic, clearances, and students at the side of the bus. A crucial limitation of outside convex mirrors is that they present a view of people and objects that does not accurately reflect their actual size and distance from the bus. Outside convex mirrors should be positioned so the driver can see the entire side of the bus up to the mirror mounts, the front of the rear tires touching the ground, and at least one traffic lane on either side of the bus.

Outside crossover mirrors are mounted on both the left and right front corners of the school bus. Crossover mirrors are used to view the front bumper danger zone area directly in front of the bus that is not visible by direct vision, as well as the danger zones to the left side and right side of the bus, including the service door and front wheel area. Like convex mirrors, crossover mirrors present a view of people and objects that does not accurately reflect their size and distance from the bus. Crossover mirrors must be adjusted to see the entire area in front of the bus from the front bumper at ground level to where direct vision is possible, ensuring that direct vision and crossover mirror vision overlap. They must also be adjusted to see the right and left front tires touching the ground and the area from the front of the bus to the service door.

To maintain total awareness of the school bus perimeter, drivers should never rely on a single visual check. Crossover, convex, and flat mirrors should be viewed in a logical sequence to ensure no child or object is in any danger zone before moving the vehicle.

Interior Rearview Mirror and Special Visibility Equipment

The overhead inside rearview mirror is mounted directly above the windshield on the driver's side area of the bus. Its primary function is to monitor passenger activity inside the school bus. If the school bus is equipped with a glass-bottomed rear emergency door, this interior mirror may also provide limited visibility directly behind the bus.

Drivers must be aware of significant visual limitations when using the interior mirror. A blind spot area exists directly behind the driver's seat when looking into the overhead inside rearview mirror. Additionally, a large blind spot begins at the rear bumper and can extend up to 400 feet or more behind the bus in the interior mirror view. Because of this massive limitation, drivers must use the exterior side mirrors to monitor traffic that approaches and enters the rear blind spot area. The overhead inside rearview mirror should be positioned so the driver sees the top of the rear window in the top of the mirror, as well as all students, including the heads of students seated directly behind the driver.

If the school bus has a roof-mounted white strobe light, the driver should use it when visibility around the bus is limited, while obeying state or local regulations on its use. Drivers must understand and obey state or local regulations concerning the use of roof-mounted strobe lights, as rules governing their operation vary.

Vehicle Maneuvering: Tail Swing, Wind Hazards, and Backing Safety

Because of the extended rear overhang on many school buses, a school bus can have up to a three-foot tail swing during turns. Check the mirrors before and during turns to monitor the bus’s tail swing. Drivers must check their mirrors before and during turning movements to actively monitor tail swing and prevent collisions with surrounding objects, pedestrians, or vehicles.

Environmental factors also create severe handling challenges for commercial bus drivers. Strong winds affect school bus handling because the tall, flat side of the bus acts like a sail on a sailboat. In strong winds, the force can push a school bus sideways, push it off the road, or even tip it over in extreme conditions. When driving in strong winds, a driver must keep a strong grip on the steering wheel and try to anticipate gusts. A driver should slow down to lessen the effect of the wind or pull off the roadway and wait, contacting their dispatcher for information on how to proceed.

Operating a school bus in reverse presents extraordinary hazards. Backing a school bus is strongly discouraged and should only be done when there is no other safe way to move the vehicle, as backing is dangerous and increases the risk of a collision. A driver should never back a school bus when students are outside of the bus. When backing is unavoidable, the driver must signal for quiet on the bus, back slowly and smoothly, and constantly check all mirrors and rear windows while moving.

If backing is unavoidable, the driver should also post a lookout to warn of obstacles, approaching persons, and other vehicles. The backing lookout should warn the driver about obstacles, approaching people, and other vehicles, but should not give directions on how to back the bus. Finally, strict loading and unloading sequences must be followed: if backing at a student pick-up point, the driver must pick up all students and ensure they are inside before backing; if backing at a student drop-off point, the driver must unload students only after backing.